Global Patent Index - EP 4053512 A4

EP 4053512 A4 20231115 - PROPAGATION TIME MEASUREMENT DEVICE

Title (en)

PROPAGATION TIME MEASUREMENT DEVICE

Title (de)

AUSBREITUNGSZEITMESSVORRICHTUNG

Title (fr)

DISPOSITIF DE MESURE DE TEMPS DE PROPAGATION

Publication

EP 4053512 A4 20231115 (EN)

Application

EP 20882140 A 20200925

Priority

  • JP 2019196256 A 20191029
  • JP 2020036323 W 20200925

Abstract (en)

[origin: EP4053512A1] A device determines a propagation time of an acoustic signal through cross-correlation analysis between a transmission signal and a reception signal. The device generates the transmission signal to satisfy (1) a ratio of a height of a peak other than a maximum peak in an autocorrelation function of the transmission signal to a height of the maximum peak being 0.8 or less and (2) a duration of the transmission signal being at least five times a shortest period of the transmission signal or at least 20 times a half width at half maximum of the autocorrelation function of the transmission signal.

IPC 8 full level

G01F 1/66 (2022.01); G01F 1/667 (2022.01)

CPC (source: CN EP US)

G01F 1/66 (2013.01 - CN); G01F 1/662 (2013.01 - EP); G01F 1/667 (2013.01 - US); G01F 1/667 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 4053512 A1 20220907; EP 4053512 A4 20231115; CN 114599940 A 20220607; JP 2021071307 A 20210506; TW 202117289 A 20210501; TW I759886 B 20220401; US 2022291026 A1 20220915; WO 2021084985 A1 20210506

DOCDB simple family (application)

EP 20882140 A 20200925; CN 202080073685 A 20200925; JP 2019196256 A 20191029; JP 2020036323 W 20200925; TW 109133980 A 20200930; US 202017769888 A 20200925